[VB.NET][TUT] STRINGS - Big TUT Collection Part 4

-------How to VB.NET String.Copy()

VB.NET String Copy method is create a new String object with the same content


System.String.Copy(ByVal str As String) As String

Parameters:

String str : The argument String for Copy method

Returns:

String : Returns a new String as the same content of argument String

Exceptions:

System.ArgumentNullException : If the argument is null.

Example:

 Public Class Form1  
   Private Sub Button1_Click(ByVal sender As System.Object, _  
   ByVal e As System.EventArgs) Handles Button1.Click  
     Dim str1 As String  
     Dim str2 As String  
     str1 = "VB.NET Copy() test"  
     str2 = String.Copy(str1)  
     MsgBox(str2)  
   End Sub  
 End Class  

-------How to VB.NET String.Contains()

The Contains method in the VB.NET String Class check the specified parameter String exist in the String

System.String.Contains(String str) As Boolean

Parameters:

String str - input String for search

Returns:

Boolean - Yes/No

If the str Contains in the String then it returns true

If the str does not Contains in the String it returns False

For ex: "This is a Test".Contains("is") return True

"This is a Test".Contains("yes") return False

Exceptions:

System.ArgumentNullException : If the argument is null

Example:

 Public Class Form1  
   Private Sub Button1_Click(ByVal sender As System.Object, _  
   ByVal e As System.EventArgs) Handles Button1.Click  
     Dim str As String  
     str = "VB.NET TOP 10 BOOKS"  
     If str.Contains("TOP") = True Then  
       MsgBox("The string Contains() 'TOP' ")  
     Else  
       MsgBox("The String does not Contains() 'TOP'")  
     End If  
   End Sub  
 End Class